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Contents of /trunk/3rdparty/portaudio/include/pa_asio.h

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Revision 273 - (show annotations) (download)
Fri Nov 12 01:10:22 2010 UTC (9 years, 2 months ago) by william
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1 #ifndef PA_ASIO_H
2 #define PA_ASIO_H
3 /*
4 * $Id: pa_asio.h 1400 2009-01-21 10:20:42Z rossb $
5 * PortAudio Portable Real-Time Audio Library
6 * ASIO specific extensions
7 *
8 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining
11 * a copy of this software and associated documentation files
12 * (the "Software"), to deal in the Software without restriction,
13 * including without limitation the rights to use, copy, modify, merge,
14 * publish, distribute, sublicense, and/or sell copies of the Software,
15 * and to permit persons to whom the Software is furnished to do so,
16 * subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be
19 * included in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
25 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
26 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 */
29
30 /*
31 * The text above constitutes the entire PortAudio license; however,
32 * the PortAudio community also makes the following non-binding requests:
33 *
34 * Any person wishing to distribute modifications to the Software is
35 * requested to send the modifications to the original developer so that
36 * they can be incorporated into the canonical version. It is also
37 * requested that these non-binding requests be included along with the
38 * license above.
39 */
40
41
42 /** @file
43 @ingroup public_header
44 @brief ASIO-specific PortAudio API extension header file.
45 */
46
47
48 #include "portaudio.h"
49
50 #ifdef __cplusplus
51 extern "C"
52 {
53 #endif /* __cplusplus */
54
55
56 /** Retrieve legal latency settings for the specificed device, in samples.
57
58 @param device The global index of the device about which the query is being made.
59 @param minLatency A pointer to the location which will recieve the minimum latency value.
60 @param maxLatency A pointer to the location which will recieve the maximum latency value.
61 @param preferredLatency A pointer to the location which will recieve the preferred latency value.
62 @param granularity A pointer to the location which will recieve the granularity. This value
63 determines which values between minLatency and maxLatency are available. ie the step size,
64 if granularity is -1 then available latency settings are powers of two.
65
66 @see ASIOGetBufferSize in the ASIO SDK.
67
68 @todo This function should have a better name, any suggestions?
69 */
70 PaError PaAsio_GetAvailableLatencyValues( PaDeviceIndex device,
71 long *minLatency, long *maxLatency, long *preferredLatency, long *granularity );
72
73
74 /** Display the ASIO control panel for the specified device.
75
76 @param device The global index of the device whose control panel is to be displayed.
77 @param systemSpecific On Windows, the calling application's main window handle,
78 on Macintosh this value should be zero.
79 */
80 PaError PaAsio_ShowControlPanel( PaDeviceIndex device, void* systemSpecific );
81
82
83
84
85 /** Retrieve a pointer to a string containing the name of the specified
86 input channel. The string is valid until Pa_Terminate is called.
87
88 The string will be no longer than 32 characters including the null terminator.
89 */
90 PaError PaAsio_GetInputChannelName( PaDeviceIndex device, int channelIndex,
91 const char** channelName );
92
93
94 /** Retrieve a pointer to a string containing the name of the specified
95 input channel. The string is valid until Pa_Terminate is called.
96
97 The string will be no longer than 32 characters including the null terminator.
98 */
99 PaError PaAsio_GetOutputChannelName( PaDeviceIndex device, int channelIndex,
100 const char** channelName );
101
102
103 /** Set the sample rate of an open paASIO stream.
104
105 @param stream The stream to operate on.
106 @param sampleRate The new sample rate.
107
108 Note that this function may fail if the stream is alredy running and the
109 ASIO driver does not support switching the sample rate of a running stream.
110
111 Returns paIncompatibleStreamHostApi if stream is not a paASIO stream.
112 */
113 PaError PaAsio_SetStreamSampleRate( PaStream* stream, double sampleRate );
114
115
116 #define paAsioUseChannelSelectors (0x01)
117
118 typedef struct PaAsioStreamInfo{
119 unsigned long size; /**< sizeof(PaAsioStreamInfo) */
120 PaHostApiTypeId hostApiType; /**< paASIO */
121 unsigned long version; /**< 1 */
122
123 unsigned long flags;
124
125 /* Support for opening only specific channels of an ASIO device.
126 If the paAsioUseChannelSelectors flag is set, channelSelectors is a
127 pointer to an array of integers specifying the device channels to use.
128 When used, the length of the channelSelectors array must match the
129 corresponding channelCount parameter to Pa_OpenStream() otherwise a
130 crash may result.
131 The values in the selectors array must specify channels within the
132 range of supported channels for the device or paInvalidChannelCount will
133 result.
134 */
135 int *channelSelectors;
136 }PaAsioStreamInfo;
137
138
139 #ifdef __cplusplus
140 }
141 #endif /* __cplusplus */
142
143 #endif /* PA_ASIO_H */

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